Alarm codeA7454
Position value preprocessing is unable to validate an assigned encoder because no valid encoder data set exists or is improperly assigned. The manual's first action is: “Check the drive data sets, encoder data sets and encoder assignment.”
- Model
- Siemens SINAMICS V90, SIMOTICS S-1FL6
- Display shows
- A7454
- Type
- Alarm code
- Source
- Manual p. 307
What A7454 means
LR: Position value preprocessing does not have a valid encoder p. 307
Common causes
- One of the following problems has occurred with the position actual value preprocessing: p. 307
- An encoder is not assigned for the position actual value preprocessing. p. 307
- An encoder is assigned, but no encoder data set. p. 307
- An encoder an encoder data set have been assigned, however, the encoder data set does not contain any encoder data or invalid data. p. 307
Safety warnings — read before you start
- DANGERGeneral Safety Instructions. Qualified Personnel The product/system described in this documentation may be operated only by personnel qualified for the specific task in accordance with the relevant documentation, in particular its warning notices and safety instructions. p. 2
- WARNINGRisk of Electric Shock and Fire. Risk of electric shock and fire from supply networks with an excessively low impedance Excessively high short-circuit currents can lead to the protective devices not being able to interrupt these short-circuit currents and being destroyed, and thus causing electric shock or a fire. p. 12
- WARNINGElectric Shock if No Ground Connection. Electric shock if there is no ground connection For missing or incorrectly implemented protective conductor connection for devices with protection class I, high voltages can be present at open, exposed parts, which when touched, can result in death or severe injury. p. 12
- WARNINGElectric Shock Due to Unsuitable Power Supply. Electric shock due to connection to an unsuitable power supply When equipment is connected to an unsuitable power supply, exposed components may carry a hazardous voltage that might result in serious injury or death. p. 12
What to do
- Check the drive data sets, encoder data sets and encoder assignment. p. 307
If A7454 is still not resolved
- Contact service / dealer for assistance p. 2 “Qualified Personnel The product/system described in this documentation may be operated only by personnel qualified for the specific task in accordance with the relevant documentation, in particular its warning notices and safety instructions.”
- Contact service / dealer for assistance p. 13 “NOTICE Property damage due to loose power connections Insufficient tightening torques or vibration can result in loose power connections. This can result in damage due to fire, device defects or malfunctions.”
This page summarises what the manufacturer’s manual says about A7454; each statement links to the page it comes from, and quoted lines are copied word for word. It is not a substitute for the manual or for a qualified installer. ManualLib is not affiliated with Siemens. Found a mistake? Report an error.